Ecumaster forum

Is it allowed to splice the sensor grounds to the same point as the power grounds, device ground?

Angelo S38 wrote:Is it allowed to splice the sensor grounds to the same point as the power grounds, device ground?

Sensor ground is an input not an output.

Indeed but on page 31 of the manual it is kept separate from the rest, it would be easier to incoorporate it in the existing wiring loom if I can connect them together to the same point. I assume this is OK because B17 an B18 are connected internally, but I'm looking for some confirmation.

Angelo S38 wrote:Indeed but on page 31 of the manual it is kept separate from the rest, it would be easier to incoorporate it in the existing wiring loom if I can connect them together to the same point. I assume this is OK because B17 an B18 are connected internally, but I'm looking for some confirmation.

Connect Sensor ground to your sensors, not to ground. If you are replacing another ECU and not doing a flying lead harness, you probably only have one sensor ground wire from the engine at the stock ECU, that wire will branch out to the necessary sensors in the engine loom. Verify this with appropriate wiring diagram if available, or you can get out your multi-meter and check resistance.You need to ground your CLT, IAT, TPS, probably triggers, etc...they connect to sensor ground.

Same situation as B23 +5v supply, some sensors need a 5v supply, sensor ground, and then the actual signal wire back to EMU. see pg 39-43

Superb Thanks for the tips will do some more investigation (stripping the loom as we speak) and report back. Thanks Scott!!